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1、 So severe ____ the habitat loss that many species are now endangered.A、is B、are C、was D、were
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2、 The documentary, ____ by a renowned filmmaker, exposed the plight of endangered species.A、producing B、produced C、to produce D、having produced
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3、 If we ____ more resources to conservation earlier, the crisis would be less severe.A、invest B、invested C、had invested D、would invest
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4、 The Amazon Rainforest, ____ destruction continues, is a vital carbon sink.A、who B、whom C、whose D、which
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5、 Not until the wetland was destroyed ____ the public realize its importance.A、did B、does C、has D、had
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6、 The conference on biodiversity, ____ last month, highlighted urgent conservation needs.A、holding B、held C、to hold D、having held
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7、 ____ by pollution, the river ecosystem is struggling to recover.A、Affected B、Affecting C、To affect D、Having affected
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8、 It is crucial that we ____ immediate action to combat climate change.A、take B、took C、will take D、had taken
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9、 The research team, ____ focus is on coral reefs, discovered a new species of fish.A、which B、whose C、that D、whom
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10、 Had the government not implemented strict laws, the ecosystem ____ irreparably damaged.A、would be B、would have been C、is D、had been
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11、 ____ agriculture aims to preserve natural habitats while feeding the population.A、Harmful B、Eco-friendly C、Traditional D、Modern
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12、 The Arctic tundra is ____ by oil exploration and melting permafrost.A、Protected B、Endangered C、Improved D、Studied
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13、 ____ like pollination have significant economic value.A、Natural benefits B、Human activities C、Industrial products D、Urban development
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14、 The carbon sink function of forests helps ____ greenhouse gases.A、release B、store C、produce D、waste
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15、 The ____ of rainforests is being eroded by incessant logging.A、Variety of life B、Plant growth C、Water systems D、Climate patterns
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16、 Coral reefs are facing ____ due to ocean acidification.A、Color loss B、Growth C、Expansion D、Protection
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17、 Wetlands act as natural filters, ____ water pollution and flooding.A、Worsening B、Ignoring C、Reducing D、Causing
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18、 The ____ of migratory birds is being altered by climatic shifts.A、Study of climate B、Study of seasonal cycles C、Study of oceans D、Study of rocks
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19、 ____ can disrupt the delicate balance of forest ecosystems.A、Reforestation B、Tree cutting C、Urbanization D、Farming
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20、 The drastic ____ in bee populations has raised concerns about pollination networks.A、minor B、rapid C、gradual D、stable